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[Success] Radeon RX 6800 XT - Big Sur

Joined
Sep 23, 2013
Messages
4
Motherboard
Z370 Aorus Gaming K3
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i5 8600K
Graphics
RX 6800
Mac
  1. Mac Pro
I switched from PowerColor 5700 XT Red Dragon to XFX RX 6800 Qick 319 and everything just worked directly. No changes done in OpenCore or macOS! Using 11.4 Beta 1.

Also, I've been reading through the thread and there seems to be some 6800 XT/6900 XT that have problems and some that seems to work out of the box. How do you know which ones work? I read something about device ID but I'm not sure where I can see that on a store web page.
 
Last edited:
Joined
Dec 10, 2018
Messages
242
Motherboard
Asus Prime X299-A
CPU
7960X
Graphics
6900 XT
Mac
  1. MacBook Pro
  2. Mac Pro
Mobile Phone
  1. iOS
I switched from PowerColor 5700 XT Red Dragon to XFX RX 6800 Qick 319 and everything just worked directly. No changes done in OpenCore or macOS! Using 11.4 Beta 1.

Also, I've been reading through the thread and there seems to be some 6800 XT/6900 XT that have problems and some that seems to work out of the box. How do you know which ones work? I read something about device ID but I'm not sure where I can see that on a store web page.
you can’t see it on a store web page.

my suggestion is that the thread creator adds a chapter to the main post, where we can list all the tried gpu’s, and let people know what worked and not.

I start:

Powercolor 6900 XT Red Devil (AXRX 6900XT 16GBD6-3DHE/OC), works fine on MacPro7,1 with agdpmod added.
 
Joined
Aug 1, 2019
Messages
1
Motherboard
Gigabyte Aorus Z390 Pro WiFi
CPU
Intel i7-9700K
Graphics
Radeon 6900 XT
Mac
  1. MacBook Pro
you can’t see it on a store web page.

my suggestion is that the thread creator adds a chapter to the main post, where we can list all the tried gpu’s, and let people know what worked and not.

I start:

Powercolor 6900 XT Red Devil (AXRX 6900XT 16GBD6-3DHE/OC), works fine on MacPro7,1 with agdpmod added.
Thank you for this. I had picked one of those up at Microcenter and was waiting for confirmation before upgrading to Big Sur.
 
Joined
Jul 14, 2020
Messages
180
Motherboard
Gigabyte Z490 Vision D
CPU
i7-10700K
Graphics
Sapphire RX6800
Mac
  1. MacBook Pro
Mobile Phone
  1. iOS
you can’t see it on a store web page.

my suggestion is that the thread creator adds a chapter to the main post, where we can list all the tried gpu’s, and let people know what worked and not.

I start:

Powercolor 6900 XT Red Devil (AXRX 6900XT 16GBD6-3DHE/OC), works fine on MacPro7,1 with agdpmod added.
Good idea.

Sapphire Nitro+ RX6800 works perfectly with iMac 19,1 and agdpmod boot arg
 
Joined
Oct 15, 2013
Messages
120
Motherboard
ASUS PRIME X299-A
CPU
i9-7960X
Graphics
RX 6900 XT
Mac
  1. Mac Pro
Mobile Phone
  1. iOS
My score is not very good, I see some close to 190000, I must have something wrong.
Screenshot 2021-05-05 at 23.09.05.png
 
Joined
Jun 15, 2012
Messages
471
Motherboard
Gigabyte Z370 AORUS Gaming 7-F13
CPU
i7-8700K OC @ 5.1Ghz
Graphics
RX 6900 XT
Mac
  1. MacBook Pro
  2. Mac Pro
Classic Mac
  1. Performa
Mobile Phone
  1. iOS
I genuinely don't like geekbench scorcing because doesn't wait long enough to get cpu or gpu out of idle state. I can literally watch it benchmark and see cpu and gpu both spend more than half of bench mark at half speed because by the time it ramps up to full clock it's starting next test and because it also pauses between tests it starts EVRY test with both cpu and gpu below full throttle

The variance in these tests can literally just be x revved up faster than y, or even just that x didn't have working power management and y did, so x started test at full clock but y started it (correctly) from an idle clock.

TL/DR, a proper bench is something that actually operates at full clock for a decent amount of time.
 
Joined
Oct 20, 2018
Messages
11
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ASUS MAXIMUS X HERO (WI-FI AC)
CPU
i7-8700K
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GTX 1080 Ti
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  1. MacBook Air
  2. MacBook Pro
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  1. iMac
  2. Power Mac
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  1. iOS
Since you've all found a way to get one, any clues as to where to pick up a 6800xt?
No idea where you're based. But for people in the UK; since yesterday Overclockers have a fair bit of stock, Scan as well, but less stock. Overclockers prices are around £1200 for a 6800XT, £1700–£2400 for a 6900XT.
 
Joined
Dec 1, 2012
Messages
71
Motherboard
ASUS ROG Strix F Z390
CPU
i7-9700K
Graphics
6800XT (Powercolor Red Dragon)
Mac
  1. MacBook Pro
No idea where you're based. But for people in the UK; since yesterday Overclockers have a fair bit of stock, Scan as well, but less stock. Overclockers prices are around £1200 for a 6800XT, £1700–£2400 for a 6900XT.
Yeah I saw that, completely insane. Could probably get an upcoming 'M2' MBP for that. It seems like when there is stock, only one store has any and so it becomes temporarily a monopoly seller and can more or less charge what it wants.
 
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